Boquerón is a department in the western region of Paraguay. It is the country's largest department, with an area of 91,669 km2 (35,394 sq mi), but, according to the statistics for 2021 by INE, its population is only 68,080, being the second least populated department. The department includes the Russian Mennonite colonies of Fernheim, Menno and its administrative center Loma Plata and Neuland. The capital is Filadelfia. Other towns are General Eugenio A. Garay, Doctor Pedro P. Peña and Mariscal Estigarribia.

Neuland Colony is a Mennonite settlement in Paraguay. After thousands of Plautdietsch-speaking Russian Mennonites fled the Soviet Union during the Great Trek of World War II, many were left displaced by the war. In response to this need, land in Boquerón Department was purchased by the Mennonite Central Committee in 1947 and settled by these same Mennonite refugees from Europe. As of 2008 the colony had about 3,400 residents.